build(deps): bump fastavro from 1.9.3 to 1.9.4

Bumps [fastavro](https://github.com/fastavro/fastavro) from 1.9.3 to 1.9.4.
- [Release notes](https://github.com/fastavro/fastavro/releases)
- [Changelog](https://github.com/fastavro/fastavro/blob/master/ChangeLog)
- [Commits](fastavro/fastavro@1.9.3...1.9.4)

---
updated-dependencies:
- dependency-name: fastavro
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,7 +1,7 @@
 azure-servicebus==7.11.4
 boto3
 confluent-kafka==2.3.0
-fastavro==1.9.3
+fastavro==1.9.4
 fastparquet==2024.2.0
 pandas==2.2.0
 pika==1.3.2